Cold Deck Pitched Roof

This arrangement allows the deck to become cold.

Cold deck pitched roof.

As for insulating below the joists an insulating laminate insulation bonded to plasterboard such as celotex pl4000 or a separate rigid pir insulation board finished with a separate sheet of plasterboard can be securely fixed to the joists to provide an internal finish to the roof. Traditionally flat roofs simply consisted of a structural timber deck with a waterproof covering directly applied to the top of the deck. In a cold weather such roofs are inherently prone to condensation which can cause material decay and deterioration. Traditional cold deck flat roof.

Where the insulation is placed above the structural deck warm deck and either above or below the waterproofing. Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs. A cold roof design usually leaves a 50mm gap between the top of the insulation and the roof deck above. The breakdown warm roof vs cold roof.

If the roof covering or roof membrane is a material of high moisture resistance or impermeable then the building regulations require a 50mm wide ventilation gap. Alternatively battens can be secured to the underside of the. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. So what exactly is a cold roof.

Guidance advice on. This design dates back many years and flat roof insulation was somewhat of an afterthought with this type of roof. In building construction roof pitch is a numerical measure of the steepness of a roof. Which makes sense as this space is otherwise empty and so it s a simple low impact way to insulate a roof.

In pitched roof construction thermal insulation can be placed horizontally at ceiling level cold. What is a cold roof. A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. Where a cold flat roof does incorporate insulation this is.

Cold deck roof a cold deck roof is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof. In the case of cold roofs the residential flat roofs have the waterproof placed directly on the deck and any insulation would be placed above the ceiling. There is no need for additional ventilation. Hopefully this video will help explain the difference between cold flat roof construction and warm flat roof construction this videos show detailed drawings.

Ventilation is required for these roofs. Well a cold roof is created by laying insulation between the rafters. It is universally recommended that cold deck flat roof construction should be avoided.